21428092151 has 4 divisors (see below), whose sum is σ = 21571905000. Its totient is φ = 21284279304.

The previous prime is 21428092123. The next prime is 21428092159. The reversal of 21428092151 is 15129082412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21428092151 - 2³⁰ = 20354350327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21428092159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71906201 + ... + 71906498.

It is an arithmetic number, because the mean of its divisors is an integer number (5392976250).

Almost surely, 2^21428092151 is an apocalyptic number.

21428092151 is a deficient number, since it is larger than the sum of its proper divisors (143812849).

21428092151 is a wasteful number, since it uses less digits than its factorization.

21428092151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143812848.

The product of its (nonzero) digits is 11520, while the sum is 35.

The spelling of 21428092151 in words is "twenty-one billion, four hundred twenty-eight million, ninety-two thousand, one hundred fifty-one".